No, it didn't work. The idea of cutting the hours was that overall, there would be a savings because the nurses would take less sick leave and it would improve patient care.
While there was some improvement, it didn't actually save any money and now costs more money from the government and to hire more staff to cover the work that needs to be done.
Money is finite. They can't just get it out of thin air. If the goal was to save money and that didn't happen, they didn't reach their goal.